YJ-320A -70~+6dBm YJ-320C -50~+26dBm Handheld Mini Optical Power Meter YJ-320 handheld optical power meter is a compact and an easy-to-use testing instrument for optical fiber networks, which can be used for absolute optical power measurements as well as for relative loss measurements in optical fibers. It features ingenious appearance, wide range of power measurement, high accuracy. Applicapions: Maintenance in Maintenance CATV Test Lab of optical fibers Other Fiber Optic Measurements Model: YJ-320A YJ-320C Measurement Range(dBm): -70 to +6dBm -50 to +26dBm Wavelength Rangenm: 800 to 1700 Detector Type: InGaAs Uncertainty: ±5% Calibrated Wavelength: 850 1300 1310 1490 1550 1625 nm Accuracy: 0.05dB Operating Temperature: -10℃ to +50℃ Auto-off Time: 10 min Operating Time: 100 h (Without batteries, bring your own 3 AA batteries) Color: As Shown Material: ABS Package Contents: 1 set * YJ-320A mini optical power meter tester Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.